Biden heads to Chicago for a hero’s goodbye  POLITICOBiden was a spectator at his first DNC. Now, at his 13th, he’s an incumbent president passing the torch  CNNBiden’s Goodbye to Politics Will Begin in Earnest With His Convention Speech  The New York TimesBiden to make a forceful case for Harris and Walz in convention speech  NBC NewsJoe Biden, Monday’s prime-time keynote speaker at DNC, to make case to elect Kamala Harris  Chicago Sun-Times